1997 IUCN red list of threatened plants (1997)

Adansonia - Muséum national d'histoire naturelle (France) (Muséum d'histoire naturelle, Laboratoire de Phanérogamie, 1977)

Atoll research bulletin - Smithsonian Institution ([Smithsonian Press, 1994)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1975)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1975)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1975)

The World List of Threatened Trees (1998)